<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>1_放大与过度</title>
    <style>
        div{
          width: 100px;
          height: 100px;
          background-color: #f00;
          margin: 100px auto 0;
          transition: 2s;
        }
        div:hover{
          background-color: #0aa1ed;
          border-radius: 50px;

          transform: scale(2) rotate(360deg);
        }
    </style>
</head>
<body>
  <div></div>

</body>
</html>